87cherokee electrical problem

My 87 cherokee starts and will run for 2 days and then die. It will turn over but will not engage. When jiggling the wire connectors to the ignition module will sometimes help get it going but it won't last. waitinh an hour usually works and it will ast for a couple of days but it eventually dies out. I ve had it tested and they said it was the ignition module. The connectors were cleaned. This seemed to solve the problem for a short time but it still conked out 2 days later. any ideas
Thanks